My MongoDB has recently been using lots of CPU on IO Wait. I believe by switching to XFS filesystem it should stop these issues. How can I successfully do this without corrupting any of my current data? I am on Ubuntu 18.04. My disk is currently ext4.
How to switch mongodb from ext4 to xfs:
It is simple : Add SECONDARY member with xfs, after the member finish with the replication , you can switch to that member and remove the other with the ext4 fs.
if switching will solve the IO: Perhaps adding more RAM will help more